They were ripped apart as if they were made out of paper.
And the suit they showed through most of the movie looked dumb...and kept malfunctioning.
Even War Machine looked like an Iron Idiot!
Oh...and if you didn't see the Avengers movie...a lot of references to that movie will make you say WTF?

IM2 did fuck with the villian somewhat. Whiplash was named Anton Vanko, which is actually the name of one of IM's more popular villians Crimson Dynamo...but for some reason they turned him into the less popular Whiplash.

Still not as bad as what they did to Mandarin but still. Why can't they do a villian somewhat good anymore like the Iron Monger? At least they didn't fuck him up.

Posted a thread about this earlier. It was pretty bad, and I loved Iron Man 1. Had some jokes and whatnot but knew when to be serious. This was joke after joke after joke joke after joke after joke joke after joke after joke joke after joke after joke joke after joke after joke joke after joke after joke joke after joke after joke joke after joke after joke joke after joke after joke joke after joke after joke joke after joke after joke joke after joke after joke joke after joke after joke joke after joke after joke joke after joke after joke joke after joke after joke joke after joke after joke joke after joke after joke joke after joke after joke. Absolutely NOTHING of any substance.